Start by being honest about what your parent actually needs today. Independent living is for seniors who are still capable and social but tired of yardwork, cooking, and stairs. If your parent needs help with bathing, medications, or daily supervision, that's assisted living, and it's worth reading our Assisted Living page instead. In our experience, families who choose independent living too late end up moving twice, so pick it while your parent can genuinely enjoy the freedom it offers.
In St. Thomas the landscape is compact, which is a real advantage. Options tend to cluster near the core and along the residential streets north and east of downtown, keeping residents close to the St. Thomas Elgin General Hospital, pharmacies, and familiar shops. If your parent still drives, parking and easy road access matter; if not, look for a residence near public transit or one with its own scheduled shuttle. Because this is a smaller community, availability can swing more than in a big city, so once you find a place that fits, ask about waitlists early rather than assuming a suite will be open when you're ready.
Our default advice here: prioritize location and social fit first, then budget, then amenities. A residence three minutes from your parent's church, doctor, or old neighbourhood will get more visits and less loneliness than a fancier building across town. Ontario retirement homes are licensed by the Retirement Homes Regulatory Authority (RHRA), so you can check a residence's standing before you tour. Do keep in mind that independent living is largely private-pay in Ontario, and rates vary by suite size and the services bundled in.
The trade-off with independent living is that it doesn't include hands-on care, so if health declines you may need to add Home Care or move up a level later. Ask each residence whether they allow outside home-care providers and whether they have an assisted-living option on-site, so a future change doesn't mean starting over.